Display screen with a graphical user interface



The FIGURE is a front view of a display screen with a graphical user interface, showing the new design.

The differing weights of grey shading in the FIGURE represents contrast in tone.

The broken lines of uneven length illustrate the boundary of the claimed design and form no part thereof. The broken lines of even length depict portions of the display screen with a graphical user interface and surrounding environment that forms no part of the claim design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 